Warm-air furnace



(No Model.) 7 2 Sheets-Sheet 1 J. WALSH.

WARM AIR FURNACE. No. 301,022. Patented June 24, 1884.

' Q W F faw w 2 Sheets-Sheet 2.

J. WALSH.

WARM AIR FURNACE.

(No Model.)

Patented June 24, 1884.

N. PETERS Pma-uma ra hur, Washington. D. c.

Nirnn Srrns JOHN wALsH, or NEWTON, IOWA.

WARIVI AI R FURNACE.

SPECIFICATION forming part of Letters Patent No. 301,022, dated June 2.4, 1884:.- A pplieation filed October 20, 1883. (No model.)

To all whom 7125 may concern-.-

Be it known that I, J oHNWALsH, a citizen of theUnited States, residing at Newton, in the county of Jasper and State of Iowa, have invented certain new and useful Improvements in Warm-Air Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable thers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure l of the drawings is a representation of a side elevation. Fig. 2 is a vertical longitudinal sectional view. Figs. 3 and 4. are transverse vertical sectional views. Fig. 5 is a sectional detail View of the air-valves in the partition a.

This invention has relation-to furnaces for heating and ventilating buildings; and it consists in the construction and novel arrangement of devices, as will be hereinafter fully described, and particularly pointed out in the claims appended.

Referring by letter to the accompanying drawings, a and a designate the front and rear walls of the furnace. b and b designate the side walls of the same. 0 0 indicate the 1011- gitudinal side walls of the fire-box c, ash-pit c and the horizontal flue a", leading therefrom to and over the transverse wall (I. All of these walls are of brick, and of any suitable thickness, height, and length. The walls a c are covered by metal plates d, to form the horizontal fine 0. Between the side walls I) and b and the side walls 0 c of the central horizontal flue, 0, spaces 0 e are formed, which are filled with sand up to the line e. Other equivalent material may be used. A short dis tance above the metal plates cl the side walls Z) and b are built in proper shape to receive the ends of a corrugated metallic floor,f, the corrugations running transversely of the furnace. The floor f forms the top of the return-flue over the sand and metal plates or arch for the prod nets of combustion, the smoke passing tothe front of the furnace, and escaping through the smoke-fines g g, leading therefrom to the chimney. The highest portions of the corrugations 71v of the floor f are provided with partitionstrips h, extending entirely across the furnace; and above these strips h, and secured to the transverse pivoted bars a, are the partition-strips t, the lower edges. of which are constructed to overlap the upper edges of the corresponding lower stationary partitionstrip, h, when the strips i are turned to a vertical position. The pivoted bars 6 have eyes at one end, which may be connected by a le ver to operate them simultaneously, if desired but this is seldom required, as in large buildings it is not necessary usually to heatall of the apartments at once. The pivoted bars z,

- besides serving the purpose of turning the up per partition-strips, 'i, to open and close communication between the compartments of the hotair chamber 7r, which is formed between the corrugated floor and the metallic roof it, serve to support the metallic roof is, which is of roofing-tin covered with ashes or other suitable non-conducting material. Instead of roofing-tin, I may use any other suitable sheet material. The roof 7c is flanged 011 both sides and at its front end, to hold the non-conduct ing material placed thereon in position. Its rear end need not be flanged, as it abuts against the front wall of a cold-air conductor, to be hereinafter explained. Leading from the hotair chamber is through roof 7s and to the compartments to be warmed and ventilated are the hot-air pipes Z; and there should be one hot-air pipe 1 for each room to be warmed, the furnace being built with this end in view. Upon the roof is, and connected with the hotair pipes Z, are the evaporators m m, which are divided into compartments mone compartment connecting with each hot-air tube Z, to

moisten the hot air before it is admitted to the apartment to be heated. The hot-air pipes and evaporators are preferably arranged so that there will be a portion of each on opposite sides of the roof it; but this is not essentially necessary, as circumstances may require that they be all arranged 011 one side. The cold-air compartment is built at the rear or side of the furnace and in connection with it. Partitions n a are built in this compartment, dividing it into three chambers. The partitions a a do not extend quite to the bottom of the cold-air compartment, so that at the bottom. this compartment is open its entire width. The cold-air compartment it extends at its base along the sides of the furnace, and is connected by cold-air pipes o with the hotair chamber k, preferably on opposite sides of the furnace. Cold air is admitted to the receiving compartment at the rear of furnace from outside windows at opposite sides of the building through pipes 11 12, connected with the cold-air receiver.

The windows above referred to are constructed as follows in either location: The windows q q are composed of stationary slats a", inclining from above downwardly and outwardly, and secured in the sides of the window-frame, so as to leave spaces about equal to the width of the slats 1- between them. Above each of the spaces thus formed is pivoted a valve or hinged slat, a", the purpose of which will be hereinafter explained. The vertical partitions n n are provided for a portion of their length near their upper ends with narrow transverse slots 1" r 1' 1*", which are covered with wire-netting s, over which, on

the narrow divisions between the slots, are placed flaps s, of silk or mica, whichform valves for the slots. The windows q q are to regulate the flow of air to the cold-air receiver in case of strong wind, as seen in Fig. 4 by the arrows. A strong current of wind turns the edges of the hinged slats r, nearly closing them against the transverse inclined slats 1-, which admits the requisite amount of cold air, but excludes the strong current. A pipe, t, connects the apartments of the building with the middle chamber, 15, of the cold-air receiver, and draws off the impure air from said apartments. The warm current from above flows through the Valves or flaps s and out at the window q, and the cold air flows in at the window q, closes the valves 8 on that side, and follows the course of the arrows 1 to the hot-air chamber, as shown in Figs. 3 and 4.

In the fire-box I provide a double dump ing-grate, a, so that one-half of the fire at a time is retained, thereby preventing the eX- tinguishment of the fire.

The fire-receptacle is a central horizontal fine in which the coals are in contact with no iron except the grates. This flue prevents the fierce heat from acting on the center of the air-chambers, but dispenses it so that it is equally distributed to all parts of a large surface, preventing that scorching smell so common where air comes in contact with redhot iron. The sand at its sides takes in a large amount of heat when the fire is active, and discharges when the fire is low. Besides these,

it possesses'many other advantages which it is not necessary to enumerate herein.

Having thus fully described my invention, what I claim as new, and. desire to secure by Letters Patent, is-

1. In a hot-air furnace, the combination,

In testimony whereof I affiir my signature in presence of two witnesses.

JOHN \VALSI-I.

XVitnesses-z R. K. LAMBERT, 13. H. PAGE. 

